Hi All, I was a Jet Mech in USAF from 1970 thru 1978. Worked flightline and trim pad on F4s for four years and have pain(7-8) in both knees all the time. I believe this pain was caused by working under F4's on my knees as there was no such thing as PPE back then. I have reported this pain for nearly 10 years whenever I am at the VA Hospital. I am wondering if anyone else has experienced this and submitted a claim. Any help is appreciated...